/Engine/Source/Runtime/Experimental/Chaos/Public/GeometryCollection/GeometryCollectionClusteringUtility.h
Return an array of all child leaf nodes below the specified node. If bOnlyRigids is true, the first Rigid node dound is considered a leaf, regardless of an children it might have.
static void GetLeafBones ( const [FManagedArrayCollection](API\Runtime\Chaos\GeometryCollection\FManagedArrayCollection) * GeometryCollection, int BoneIndex, bool bOnlyRigids, [TArray](API\Runtime\Core\Containers\TArray)< int32 > & LeafBonesOut )